Head-gate-locking device.



G. D. BUTGHART. HEAD GATE LOOKING DEVICE. APPLICATION FILED NOV. 3,1908.

Patented Apr. 13, 1909.

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CLARENCE D. BUTCHART, OF DENVER, COLORADO.

HEAD-GATE-LOCKING nnvrcn.

Specification of Letters Patent.

Patented April 13, 1909.

Application filed November s, 1908. Serial No. 460,906.

To all whom it may concern:

Be it known that I, CLARENCE D. Boron- ART, a citizen of the UnitedStates, residing in the city and county of Denver and State of Colorado,have invented certain new and useful Improvements in Head Crate LockingDevices; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it a pertains to make and use the same, reference Being hadto the accompanying drawings, and to the figures of reference markedthereon, which form a part of this specification.

My invention relates to improvements in headgate locking devices, myobject being to provlde adjustable means for limiting the openingmovement of the head ate, said means being of such construction t at itbecomes impossible for an unauthorized person to open the gate beyond apredetermined limit which is fixed by the adjustment of the lockingdevice upon the rod or screw-stem of the gate.

The invention will now be described in detail, reference being made tothe accompanying drawing in which,

Figure 1 is a front view of an irrigating head-gate equipped With myimprovements. Fig. 2 is a detail view showing the locking device mountedupon the threaded portion of the stem of the gate, the device beingshown in the locked position and on a larger scale. Fig. 3 is a similarview showing the parts of the locking devices separated. Figs. 4 and 5are plan views in detail and on a larger scale, respectivelyillustrating the two members of the locking devices.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the head gate and 6 the frame havingparallel side bars 7 and a connecting arch 8 at the top through whichpasses the threaded portion 9 of the stem 10 of the gate. This screwstem passes through a plain or unthreaded opening in the top of theframe. To the portion of this threaded stem which extends above theframe is applied a nut 12 with which is connected a hand wheel 13 tofacilitate the turning of the nut. Upon the screw-stem below the top ofthe frame is mounted the locking devices 14 composed of two members 15and 16. The threaded part 9 of the stem is flattened on one side asshown at 17. The member 16 of the locking device has an unthreadedopening 18 which is straight on one side as shown at 19 to fit the flatside of the screwstem. The opening 18 is plain or unthreaded whereby thesaid member is vertically slidable upon the stem but cannot rotatethereon, by reason of the straight side. The member 15 is rovided with acircular opening 20 and is t ireaded as shown at 21 to engage thethreads of the screw-stem. Hence this member is arranged to travellongitudinally of the stem either up or down according to the directionof rotation.

Where head gates of this character are employed it is im ortant thatwater consumers shall be al owed to use a predetermined amount of waterand no more. The overseer of the ditch first determines the maximumextent to which the gate must be opened in order to allow thepredetermined number of inches of water to pass through. He then adjuststhe member 15 upon the screw-stem of the gate so that when the gate israised to allow the said amount of water to pass through, the member 15will engage the top of the ead gate frame and prevent the furtheropening of the gate. The locking member 16 is then brought intoengagement with the member 15 (see Figs. 1 and 2) and the hasp 22 of apadlock 23 passed through two of the registering openings 24 and 25 withwhich the locking members are provided. The hasp is then passed into thelock and cannot be removed from the looking device except by theoverseer of the ditch or canal who is the only person having a key tothe look.

It will thus be observed that my improvement affords an exceedinglysimple and cheap device for performing the aforesaid function. It isalso readily adjustable.

Having thus described my invention what I claim is:

1. A head gate locking device comprising in combination with the screwstem of'the head gate, two members, one of which is threaded to travelon the said stem while the other is slidable thereon but fixed againstrotation thereon, and means for connecting the two members to limit theopening movement of the gate, substantially as described.

2. The combination with the screwthreaded stem of a headf'gate, of alocking device composed of two members one being freely; slidablej iupon the threaded portion of the stem, the stem and member being shapedtogprevent gthe latter from rotary movement thereon, the other member"being threaded on the stem andvertically adjust.-- able thereon, thetwo membersbeing proers, for the purpose setfort h. 7 3. The combinationwith the screwthreaded stem of a head gate, of a locking device mountedthereon and composed "of' two members, the threaded member of the stembeing flattened on one side, one of the "members having an openingshaped to fit western-Land rslidabllelfreely thereon, the other memberbeing threaded on the stem, and meansfor iocking the two memberstogether to prevent rotary movement on the stem,- sub'st'antially asdescribed 1 In testi monywhereof I afiiX my signature in presence of twowitnesses.

Witnesses:

OTTO E. HODDIGK, v A. EBERT OBRIE CLARENCE D. BUTCHART.

